Round-cornering machine for book covers



May 139, 1925. 1,537,940

F. A. ERICSON ROUND CORNERING MACHINE FOR BOOK COVERS I I rmdAuL. 12, 1922 s Sheets-Sheet '1 illi 6225021 11K Z 7 a2 6/ Y (7 XW F. A. ERICSON ROUND CORNERING MACHINE FOR BOOK COVERS Filed Aug. 12, 1922 s Sheets-Sheet a jzfeiz Z07,

Patented May 19, 1925.

UNITED. STATES PATENT,OFFICE.

rnrrz'n. nmosonrorbnrcaoo, ILLINOIS, ASSIGNOR or o-NE-HALr'ro rimaran;

BENSON AND HJ'ALMAR PETERSON.

ROUND-CORN ERIN G MACHINE FOR BOOK COVERS.

Application filed August 12, 1922. Serial 'No. 581,360.

chines for Book Covers, of which the follow ing is declared to be a full, clear, and exactdescription. v

This invention relates to round cornerin machine for book. covers, and its principa l object is to provide an automatically operating machine for folding down rounded corner portions of the coverings ofbook covers and analogous articles. Another object is to provide a simple, practical, and etficient machine for accomplishing this purpose. Another object is to provide a round cornering machine with improved means for plait- 'ing or gathering the covering material at round corners, and folding down the plait's or folds upon the body portion of the cover. Other objects and advantages will appear in the course of this specificatiomand with said objects and advantages .in View, this inventIon consists in the several novel features of construction, arrangement and combination of parts hereinafter fully .set forth and claimed. i

The invention is clearly illustrated in the drawings accompanying this specification, in which:

Fig. 1, is a plan of a. round cornerin machine embodying a simple form 0 the present invention; Fig. 2, is an end view of the front end of the machine looking in the direction of arrow 2 in Fig. 1; Fig. 3 is a detail side view of a certain stop device looking in the direction of the arrow 3 in Fig. 2; Fig. 4, is a detail end view of a certain finger bar and bar depressing cam, the base plate of the machine being shown in vertical cross section taken on line 4-4 of Fig. 1; Fig. 5 is an end view of said finger bar, showing the base plate in section, taken on line 55 of Fig. 1; Fig. 6, is a detail vertical longitudinal section of the finger bar taken on line 6-6-of Fig. 1; Fig. 7, is a vertical, longitudinal section taken on line T7 of Fig. 1; Fig. 8, is a vertical, longitndiual section taken on line 8-8 of Fig. 1; Fig. 9. is a. cross section taken on line 99 of Fig. 1: Fig. 10, is a plan of the plaiting linger and its operating mechanism and showing a book cover with one of its covers being acted on; Fig. 11,.isa detail View of theplaiting finger and. a mandrel or shoe partly in side elevationand partly-in vertical, longitudinal section; Fig.12, is a View of the same parts but.sho.wing them in a different position; Fig. 13-is a plan of the, shoe seen in Figs. 11 and 12; and Fig. 14: is

a plan of a fragment of a book cover showmg the covering folded and pasted-down thereon. v

-Referringto saiddrawing s, the reference character 15 designates a base plate, which may be of rectangular form supported by legs 16. At the front end 'is a book cover uide, which com rises two guide bars 17 t lat are arrange angle to each other and are" bolted One member 18 of the guide may be in the at; right or other-- wise secured to the top ofthe base plate.

o the base plate apex portion formed by the tW 'guide bars. I

17. The "plate 18has a round edge '18,,- that cover, which is to be operated on.

conforms-to the round cornerof the book In front of the corner plate 18 is.a .man dr e1. or shoe 19 which, in the operation of the, iiiachine, oscillates from an inoperative position (see Fig. 7)' to an operative position,

(see Fig. 11). Said shoe 19 is secured upona rock shaft 20, journalled in standards 21,

which are secured to and extend up-from base plate 15, and said shoe is yieldingly pressed in the direction of the corner plate 18, by a coiled spring 22 which surrounds the rock shaft 20 and engages atone end with one of the standards 21 and at the other end with a collar 23, whichis secured upon the rock shaft 20. A stop device is provided for stopping the shoe 19 at the position seen in Fig. 11 and said stop device may comprise a collar 24 fast onthe rock shaft, and a lug 25 on one of the standards 21 The collar .24 has an arm in which is threaded an adjustment screw 26 I which is adapted to strike against the lug 25 when the shoe reaches the position seen in Fig. 11. To permit the shoe to yield slightly and thereby accommodate itself to any slight variations in the thickness of bookcovers, the shoe is shown as slidably mounted on a stem 27 that enters a socket in the shoe. A pin and slot connection 28 between'the stem 27 and shoe 19 limits the movement of the shoe on the stem. A coiled compression spring 29 confined between the shoe and a collar 30. fast on the rock shaft .20, moves the shoe to its distended position but permits it to yield when pressure is applied against its under side. Its forward end or toe 19 is'rounded off as'is seen in Fig. 13 so as to conform to the round corner of the book cover.

Abovethe corner plate '18 is a plaiting finger 32, andin its referred form, the plaiting finger has a shaped re-entrant portion 33in its forward edge, and its lower face may be formed with a shallow length wise extendin groove (see Fi 9) to receive any sligditly bulged POItIOIIS-Of the folded corner portions. The plaiting finger is supported bya'finger bar 34 which, in the operation of the machine, is oscillated or rocked in a horizontal; plane during the plait-ing and folding down operation of the nger. The finger is capa le of moving forth and back in a direction lengthwise of the machine, and is mounted on said finger bar 34' soas to have a sliding connection therewith.- As shown the finger has an upwardly extending shank .35 which is secured toa finger holding block 36- that'has a stem 37 secured to it, which enters a bore in the finger bar 34 and is slidably mounted therein.: The finger is vertically adjustable on .theblook 36 and is secured thereto by a" screw 38 which passes through a slot in the shank of the finger and is threadedly secured in-the block 36. V

The means for reciprocating the finger in a direction lengthwise of the base plate, comprises a slide-block 39 which has an arm 40 that overhangs the block 36, and'is pivotedly connected to the-block 36'.on a vertical axis, whereby the finger bar and its plaiting finger, ma be rocked'or oscillated upon said arm 40. he pivotal connection between the arm 40 and block 36 may comprise a stud or in 41 threadedly secured in the arm 40 an entering a socket 42 in the upper face of the block 36.- The pivotal connection is further arranged so the the finger bar and its plaiting finger may be depressed, during the operation of the machine, so as to put pres sure upon the folded plaits of the corner.

The-slide block 39 is guided between guide rails or bars 43 which are secured to the base plate 15,"and it is connected to a crank or crank wheel 44 by a link or connecting rod 45. The crank or'crank wheel 44 is secured upon the main drive shaft 46 of the machine,

' which shaft is journalled in bearing brackets 47 secured upon the base plate 15. During each operation of the machine the drive shaft 46 is given one complete turn, and the plaiting finger is thereby moved forward and backward by the crank wheel 44, link 55, slide block 39. and connections between the slide block and finger.

At the commencement of a cycle operation, the parts are in position illustrated in Figs. 1,

11 where it stands upon the body portion of the book cover, with the rounded end of its toe immediately behind the upturned margin portion a of the covering a. (which is to be folded down). The means for actuating the shoe 19 will now be described. A hook 48 mounted upon any suitable support, engages with a shoulder 49 formed upon the collar 23, and holds the shoe 19 in its raised position against the action of the coiled spring 22. Mounted'upon the slide block 39 is a roller 50 which underlies the hook 48 and at the commencement of a cycle of operation of the machine said roller 50 encounters a cam shaped or shoulder edge 51 on the underside of the hook 48, and lifts the hook, thereby disconnecting it from the shoulder 49 of the collar 23, and permitting the coiled spring 22 to swing the shoe 19 down upon the book cover, immediately behind the raise d'margin portion a of the covering which is to be folded down.' 13 referring to Fig. 8, it will be seen that at t e commencement of a cycle operation, the wrist pin 52 (which connects the link 45 with the crank wheel 44), is moving upward and is approaching the dead center between the axis of the main drive shaft andthe pin connection between the from the position seen in the dotted line in Fig. 8, moves the finger 32 forward over the corner of the book cover and plaits and folds down the upturned corner portion a of the covering a. During the forward movement of the finger, the latter is pressed down upon the corner of the book cover and the means for depressing and lifting the finger will now be described.

Journalled in bearing brackets 53 is a cam shaft 54 upon which is secured a cam block 55, against which bears a roller 56, that is mounted on the finger bar 34. One end of the finger bar rests on a cross bar 57 (see Fig. 6) and its other end is spring pressed in an upward direction by a spring 58, which is interposed between the finger bar and base plate (see Fig. 4). The cam block contains a low face 55 and a high face 55 both concentric with the'axis of the cam shaft book cover, during the forward movement,

and the cam face 55' ermits the s rin to lift the finger bar and finger, during the backward movement thereof. v

The cam shaft 54 is geared to the main drive shaft 46 so as to rotate at the same speed, and as shown they are geared together by a sprocket chain 58 trained around sprocket wheels 59, 60, mounted respectively on the shafts 46, 54.

Means are provided for swinging the shoe 19 upward'while the finger is folding down the corner porti'on of the covering. In't-he form of means shown, it"comprises a, link 61, which is pivotally secured to, and moves- With the slide block 39 (see Figs. 8 and 9) and an arm 62 secured upon the rock shaft 20. The link 61 has a lost motion connec-' tion with the arm 62 whereby either may move independently of the other. Said lostmotion connection may comprise a slot :63 in the link and a stud or pin '64 secured in the arm and entering said slot. When,

the shoe is released by the Book 48, the spring 22 swings it down, and because of the lost motion connection the arm 62 is free to swing down into the position, seen in dotted lines in Fig. 8, and the shoe is therefore free to swing down into the position seen in Fig, 11. During the initial forward movement of the slide block 39 and finger 32, the shoe remains at rest, pressing down on the book cover, until the end of the slot 63 encounters the pin 64, whereupon the link 61 swings the arm 62 upward until the hook engages with the shoulder on the collar 23, thereby leaving the shoe in its raised position while the link 61, slide block 39 and finger 32 arecretracted.

For the purpose of gathering the plaits formed by the plaiting finger 32, the, latter is oscillated, during at leastsome portion of its forward movement. means for oscillating the finger comprises a cam disc 65 fast on the main drive shaft,

which disc has a wave like cam portion 6 that engages with a pair of anti-friction rollers 67 mounted on a bar or other support 68. which is pivotally securcdto .the rear end of the finger bar 34 by a pin or screw 69. The rollers 67 are arranged one on each side of the disc 65, and thewave like cam portion is disposed on the disc in such position as to oscillate the finger during which extends between The simple a portion at least, of its forward stroke,

The cam disc contains a neutral position the cam part thereby permitting the finger to move back in a straight line.

The rear end of the finger baris guided between two upright posts 70, and between the bar 57 and a rod 71 ends of the posts 70.

on the lower face of the finger bar engages with the barf)? and, prevents any forward movementof the linger bar.

secured in theuppor. A roller 72 secured' In use the body portion and covering of the book covers then prepared by folding down and secur ing the straight marginal portions a of the backings upon the round corner portions standing as seen at the right hand corner A, in Fig. 10.

Thecover is then placed 17,18, to-bring the unfinished proper place. chine, rock shaft is released from the hook 48) 'the finger 32'moves forward and down bend- .ing the upstanding corner portiona down,

and at the same time the finger is oscillated, thereby whichare pressed down-upon the corner por:

tion of the body of the book cover and sel-lf are first pasted together and 3 3 n of, the book cover: w

in position on thebase plate, using the guide I g corner at the In the operation of the ma the shoe 19 swings down (when the gathering in the plaits in neat folds,

the body portions a leaving 5 cured to it. The finger thereupon is lifted b t Spring 58, (the camo55at this" time I having reached a position where its low".

side engages the roller 56) and the finger is drawn back to its original position. I

WV'hile the machine has been shown described for use in folding down the round corners of book covers, it may be used in foldingdown round, curved or many sided corners of coverings for other objects. It is capable ofuse on thick and thin covers, and corners of various shapes. The corner plate is removable and may be replaced by another one having a different form of corner than the one shown. I I

More or less variation of the, exact details of construction is possible without .departing from the spirit of this invention; I desire, therefore, not to limit myself to the exact and described, but intend, in the following claims, to point out all of the invention disclosed herein.

I claim as new and desire to secure by Letters Patent: 1

1. A round cornering'machine comprising, in combination, an oscillatory shoe, a reciprocat-ory plaiting finger, means for reciprocating said plaiting finger, and means, operating in a predeterniined timed rela tion to said finger reciprocating means, for g oscillating said shoe. v

Q. A round cornering machme comprising, in combination, an oscillatory shoe, a

form of the construction shown too .reciprocatory plaiting finger, means for reciprocatlng said plaiting finger, means for depressing said plaiting finger upon the material operated on, and means for oscillat- 5 ing said shoe in timed relation to the reciprocatory movements of the plaiting finger.

3. A round cornering machine comprising, in combination, an oscillatory shoe,v

oscillating said shoe, a reciprocatory plaiting finger, actuating mechanism for reciproeating said plaiting finger, a link connection between said shoe and finger actuating mech-.

anism including a lost motion device, means for holding said shoe in raised position against the action of the spring, and means for disconnecting said shoe holding means from the shoe.

'5. A round cornering machine comprising, in combination, an oscillatory shoe, spring pressed in one direction, a rock shaft supporting said shoe, a reciprocatory plaiting finger, finger actuating mechanism, an arm secured upon said rock shaft, a link connected with said finger actuating mechanism and having the lost motion connection with said arm, a shouldered member secured on said rock shaft, a hook arranged to engage with said shouldered member to thereby hold the shoe in raised position and, hook releasing means operated by the said finger actuating mechanism.

6. A round cornering machine comprising, in combination, an oscillatory shoe,

spring pressed in one direction, a rock shaft suppo tingsaid shoe, a reciprocatory plaiting finger, finger reciprocating mechanism,

an arm secured upon said rock shaft, a link secured upon said finger actuating mechanism and having a lost motion connection with said arm, a stop device for limiting the movement ofsaid shoe in one direction, a

shouldered member secured upon said rock shaft, a hook arranged to engage with said shouldered member for holding the shoe in raised position, said hook having a cam face,

. and a cam engaging member connected with said finger actuating mechanism, for releasing said hook from'saidshouldered member. 7. A round cornering machine comprising a base plate, a book cover guide thereon, an oscillatory shoe located oversaid guide, a reciprocatory pluiting finger, finger actuating mechanism including a reciprocatory power transmitting member, and shoe actuating mechanism operatively connectedto said .power transmitting member and operating in a predetermined timed relation with finger actuating mechanism.

8. A round cornering machine comprising, in combination, a base plate, a book cover guide thereon, a reciprocatory plaiting finger, finger actuating mechanism, and meansfor de ressing said finger upon the material acte on thereby.

9. A round cornering machine comprising, in combinatioma base plate, a finger bar, a plaiting finger carried thereby and movable lengthwise thereof, finger actuating mechanism, a cam shaft, and a cam for depressing said finger bar.

10. Around cornering machine comprising, in combination, a finger bar, spring pressed in an upward direction, a cam shaft and a cam thereon for depressing said finger bar, a plaiting finger mounted on said finger bar and movable lengthwise thereof, and finger actuating mechanism for reciprocating said finger relative to said finger bar. 7

11. A round cornering machine comprising, in combination, a finger bar, a plaiting finger having a sliding connection with said finger bar, a reciprocatory slide block connected with said plaitin-g finger, a main drive shaft, and connections between said main'drive shaft and slide block for reciprocating said slide block.

12. A round cornering machine comprising, in combination, a reciprocatory and oscillatory plaiting finger, a slide block connected thereto, amain drive shaft, a crank on said main drive shaft, a link connecting said crank with. said slide block, and operative connections between said slide block and finger for oscillating the same.

13. A round cornering machine comprisfinger guided by said finger bar to move in a direction lengthwise thereof, a slide block connected to said finger, a main drive shaft. a crank thereon, and a link connecting said crank with said slide block.

14. A round cornering machine comprising, in combination, a finger bar, spring pressed in an upward direction, a cam shaft and a cam thereon for depressing said finger bar, a plaiting finger, a block carrying said plaiting finger and having a stem guided in said finger bar, a slide block having an arm overhanging said finger supporting block, and a pin entering a socket in the top of said finger supporting block, and means for reciprocating said slide block.

'15. In a round cornering machine, a re ciprocatory finger supporting block, and a ing, in combination, a finger bar, a plaiting I pla-iting finger having a U-shaped notch in Ill mounted on said stem and having a limited outward movement thereon, and a coiled compression spring surrounding said stem and bearing against said shoe.

17. A round cornering machine comprising an "oscillatory finger bar, means for oscillating said finger bar, a plaiting finger mounted on said finger bar and movable lengthwise thereof, finger reciprocating mechanism having a pivotal connection with said finger, a main drive shaft, and a cam disc thereon having cam faces engaging with said finger bar for oscillating it.

18. A round cornering machine comprising an oscillatory finger bar, means for oscillating said finger bar a reciprooatory plaiting finger mounted thereon and movable lengthwise thereof, finger actuating means having a pivotal connection with said finger, a main drive shaft, a cam disc mounted thereon and having Wave like cam faces, and anti-friction rollers carried by said finger harand engaging with said cam disc.

19. A round cornering machine comprising a shoe, a reciprocatory and oscillatory plaiting finger cooperating therewith, means for reciprocating and other means 'for oscillating said plaiting finger.

2O. A round cornering machine comprising a shoe, a reciprocatory plaiting finger, means for reciprocating said plaitingfinger, means for oscillating said finger horizontally, and other means for oscillating said finger vertically.

FRITZ A. ERIcs'oN. 

